There's a winged horse in the first and last books of The Chronicles Of Narnia*, written by Christian and apologist C S Lewis. The Narnia books are Christian allegory, even down to the death and resurrection of Aslan, and the whole point of the children meeting Aslan was to bring them closer to Jesus and/or God.**
So now we have our winged horse!
*Fledge, formally Strawberry the cab-horse, in The Magican's Nephew and The Last Battle.
**Aslan's words to Lucy in The Voyage of The Dawn Treader. I don't have a copy here at work but it's along the lines of "I brought you here so that you would know me, now you must know me in your world" In context, this is a clear reference to Aslan being Jesus/God.
Lewis was not the sort of Christian that most people seem to think he was. Even in his Apologetic works he reveals himself to be a Universalist of sorts. He was an Atheist, and a fan of Classical Paganism, and Medieval Syncretism long before Tolkien convinced Lewis to become "the most reluctant Christian convert." And he was always a fan of Plato and the Pagan Greek philosophers.
Roger Lancelyn Greene reports that during a visit to Greece at the shrine of Apollo, Lewis stated that he practically reverted to Paganism and thought it would not have been wrong to worship at Apollo's shrine as he was a "subspecie" of Christ.
In
the Abolition of Man Lewis suggests that all the major religions shared a moral code, a Universal Truth that he called the Tao (which demonstrates how liberal his Theology was). In
Mere Christianity, Lewis suggests that God will make "all mankind as Gods if only we would let him.," which is a Gnostic/Mystical notion that most of his Moderately Conservative American Evangelical supporters would disavow as heresy if they didn't just sort of gloss over those bits.
Lewis was well aware that the Christ story was an iteration of all the previous dying and resurrected pagan sun-gods (who were nearly all represented as a lion). That he named his Lion "Christ" figure Aslan is revealing, as Aslan is the word for Lion in Turkish, Persian, and Arabic. And indeed there are Numerous associations in the Narnia books between Aslan and the Sun.
And the "Winged Horse" is clearly an iteration of PEGASUS, a creature of Pagan Mythology. Nor should one forget that the animist spirit of the waters is called a "River God" in Lewis's own words, as is the "Sleeping God of Time" who will awaken at the end of days (who appears in
the Silver Chair and
The Last Battle).
Another telling feature of the
Chronicles of Narnia is that the girls are the moral center of the books, and Lucy is the one closest to Aslan, belying the notion that Lewis was some sort of Misogynist. Instead presaging the "return of the Sacred Feminine" that would come to be a popular concept in latter 20th century neo-pagan and Wiccan circles.
Lewis intellectually accepted the science of his day (including evolution--despite attempts by Creationists to convince him otherwise). Though he thought that Materialist Reductionism was a poor model for the Psyche to live by, and placed great stock in the Imagination.
It is true that he came to believe that the Christ Story was a "True Myth" as Tolkien used that argument to win Lewis over. If anything, Lewis's worldview was pagan, and he came to view Christianity through that lens. Indeed the group of intellectuals he hung out with had a range of mystical and "occult" views, influenced by Theosophical, Neo-pagan, and Alchemical traditions.
He himself never actually intended Narnia to be "allegory" in the strict sense of the word, but rather a "supposition"; a "what if" a Christlike figure existed in another world, a magical world. It's true that he thought that his Fairy Story would be a means to "smuggle in 'Christian' Values past the 'Watchful Dragons'" of children's psyches.
But given his rather unorthodox view of Christianity (one that he reconciled with classical and animist paganism), it is quite clear that he "smuggled in" his own pagan world-view. Another particularly revealing passage is the full on Bacchanal in which Bacchus and his wild women draw Susan and Lucy into a wild ecstatic dance (
Prince Caspian).
Another telling moment is the "infamous" Emeth scene (
The Last Battle), in which a young Calormen who worshiped the Demon God Tash is accepted into the New Narnia (a sort of Heaven that is described in very Hindu/Buddhist terms). Emeth is accepted by Aslan because all the Good Works he did--believing they were to honour Tash--were actually drawing him to Aslan as All that Was Good belonged to Aslan and all that was Evil belonged to Tash.
Many of these views have drawn as much Fire and Brimstone from the Right Wing Fundamentalists as Harry Potter has. They see Lewis as a Satanic Occultist pretending to be a Christian to lure Children into "Evil."
Had he been born a generation later, I speculate that he would have had similar views to Joseph Campbell and Alan Watts. Lewis certainly was not the Religious Maniac that Phillip Pullman makes him out to be.
And frankly, If Lewis were alive to view this thread, he would be utterly appalled at the Pathetic attempts of DOC's Apologetics. It's not clear at all that Lewis interpreted the NT in quite the same manner as most orthodox Christians.
GB